Olympite Mineral Data

General Olympite Information

Chemical Formula:

LiNa5(PO4)2

Composition:

Molecular Weight = 311.83 gm

Sodium 36.86 % Na 49.69 % Na₂O

Lithium 2.23 % Li 4.79 % Li₂O

Phosphorus 19.87 % P 45.52 % P₂O₅

Oxygen 41.05 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

LiNa₅(PO₄)₂

Environment:

Ultra-alkalic phase in nepheline syenite pegmatites in differentiated alkalic massifs.

IMA Status:

Approved IMA 1980

Locality:

Mt. Rasvumchorr, Khibiny massif, and in the Lovozero massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the 1980 Summer Olympic Games, in Moscow, USSR.

Name Pronunciation:

Olympite

Synonym:

ICSD 64931

PDF 33-1272

Olympite Crystallography

Axial Ratios:

a:b:c =0.6843:1:0.6848

Cell Dimensions:

a = 10.124, b = 14.794, c = 10.132, Z = 8; V = 1,517.51 Den(Calc)= 2.73

Crystal System:

Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.582(1), 4.18(0.9), 2.531(0.7),

Physical Properties of Olympite

Cleavage:

None

Color:

Colorless.

Density:

2.8

Diaphaneity:

Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Olympite

Gladstone-Dale:

CI meas= 0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1871,KPDmeas= 0.1824,KC= 0.1924
Ncalc = 1.53 - 1.54

Optical Data:

Biaxial (+), a=1.51, b=1.51, g=1.512, bire=0.0020, 2V(Calc)=0, 2V(Meas)=46.

Calculated Properties of Olympite

Electron Density:

Bulk Density (Electron Density)=2.66 gm/cc
note: Specific Gravity of Olympite =2.73 gm/cc.

Fermion Index:

Fermion Index = 0.0018664269
Boson Index = 0.9981335731

Photoelectric:

PE_Olympite= 1.54 barns/electron
U=PE_Olympite x rElectron Density= 4.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Olympite is Not Radioactive

Olympite Classification

Dana Class:

38.04.10.02 (38)Anhydrous Phosphates, etc

(38.04)A+ XO4

(38.04.10)Lithiophosphate Group

38.04.10.01 Lithiophosphate Li3PO4 P mn2₁ mm2

38.04.10.02 Olympite LiNa5(PO4)2 P 2₁2₁2₁ 2 2 2

38.04.10.03 Nalipoite NaLi2PO4 Pmnb 2/m 2/m 2/m

Strunz Class:

08.AA.30 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AA -With small cations (some also with larger ones)

08.AA.30 Olympite LiNa5(PO4)2 P 2₁2₁2₁ 2 2 2

Other Olympite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.79,p571,1994) OPTIC PROP.(Am.Min.,Vol.79,p571,1994)

See Also:

Links to other databases for Olympite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Olympite Specimen Label here :

Olympite

LiNa5(PO4)2
Dana No: 38.04.10.02 Strunz No: 08.AA.30
Locality:

Notes:

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